What I did up here was add the class of toggle-icon to the top link, and the class of icon-toggle to the span of the glyphicon...the JS is as follows:

// On Toggle-Icon Click
$('.toggle-icon').click(function(){
// Set Icon To toggle in function
var IconToToggle = $(this).find('.icon-toggle');
// If the icon is the bottom icon
if (IconToToggle.hasClass('glyphicon-triangle-bottom')) {
// Change the icon to the top icon
IconToToggle.removeClass('glyphicon-triangle-bottom').addClass('glyphicon-triangle-top');
// Otherwise
} else {
// Change the top icon to the bottom icon
IconToToggle.removeClass('glyphicon-triangle-top').addClass('glyphicon-triangle-bottom');
}
})